si

/ˈsi/

//ˈsi// pron

The verdict

“si” sits in 20 confusable pairs (corpus #482) as a pronoun. The look-alike neighbours are the real trap.

#482
frequency rank, Portuguese
1,185
“S” headwords
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - refere-se à terceira pessoa, indica reflexividade e é usado após preposição (a, de, em, contra, sobre, por, etc., exceto com)

Corpus desk

Index PT-si · si · Portuguese

si · rank #482 · 0 variants · 20 confusables

  • FREQ-CORE #482
  • LEN-SHORT 2 letters
  • VOW-1 1 vowel
  • CONFUS-HIGH 20 pairs
  • VAR-0 0 variants
  • BOOK-MID 1,185
  • PHOTO-FINISH longo

Nearest frequency peer: longo (-3 rank slots)

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Vizinhos de frequência do confusável “si”

Pares de peso semelhante no corpus, aparte dos confusáveis abaixo

corpus weight

What this shows As barras situam “si” face aos lemas portugueses mais próximos por rank, não um reprint da secretária de confusáveis.

Source FrequencyWords open word-frequency list As of September 3, 2026

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

si vs só
50% similar
si vs su
50% similar
si vs SW
0% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for si
PropertyValue
Headwordsi
LanguagePortuguese
Part of speechPronoun
IPA/ˈsi/
Letters2
Frequency rank#482
Misspellings tracked0
Confusable pairs20
SourceWiktionary (kaikki.org)

Rank de corpus junto a confusáveis de “si”

Da esquerda para a direita: o pouco que carrega a fala diária, depois a cauda longa quase invisível.sicai aqui:

#1#100#1K#10K#100K
← used constantlyrarely used →

Os ticks avançam em logaritmo; cada um é da ordem de dez vezes mais raro. Na mesma faixa de raridade aparecem “longo” (#479), “uns” (#485), “legal” (#478). Entre 1,185 lemas com “S”, “si” fica em #482. Source: FrequencyWords open word-frequency list.

Easy to mix with look-alikes

The spelling risk for si is neighbouring look-alikes ("só", "su", …), not just typos; it is apronoun pronounced /ˈsi/. Frequency #482 among 1,185 “S” headwords. Gloss: "refere-se à terceira pessoa, indica reflexividade e é usado após preposição (a, de, em, contra, sobre, por, etc., exceto com)".

Zero misspellings are on record for si in our index, typically a sign the spelling maps closely to how the word sounds. It also participates in 20 confusable-pair relationships, "só", "su", "SW", and more, where similar look or sound leads writers to substitute one word for another in context.

This headword's origin isn't recorded in our source data, so spelling patterns must be inferred from the word's phoneme-to-grapheme mapping rather than from a documented borrowing chain. The correct Portuguese form is si, spelled S-I.

Definition

  1. 1
    refere-se à terceira pessoa, indica reflexividade e é usado após preposição (a, de, em, contra, sobre, por, etc., exceto com)

Recorded use

Wiktionary example

These source excerpts show how si appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. Ele guardou o prêmio para si.

Synonyms

ele mesmoele próprio

This word in other languages

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 Portuguese corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "si"?
"si" is spelled S-I. The IPA pronunciation is /ˈsi/.
What does "si" mean?
As a pronoun, "si" means: refere-se à terceira pessoa, indica reflexividade e é usado após preposição (a, de, em, contra, sobre, por, etc., exceto com)
What words are commonly confused with "si"?
"si" is commonly confused with "só", "su", "SW". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "si"?
The IPA (International Phonetic Alphabet) transcription for "si" is /ˈsi/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What language does "si" come from?
"si" is a Portuguese word. PlainSpell's reference spans five languages -- English, Spanish, Portuguese, French, and German -- with definitions, pronunciations, and spelling data for each.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list